/Engine/Source/Developer/TargetPlatform/Public/Interfaces/IAudioFormat.h
Cooks up to 8 mono files into a multi-stream file (e.g. 5.1). The front left channel is required, the rest are optional.
true if succeeded, false otherwise
bool CookSurround ( [FName](API\Runtime\Core\UObject\FName) Format, const [TArray](API\Runtime\Core\Containers\TArray)< [TArray](API\Runtime\Core\Containers\TArray)< uint8 > > & SrcBuffers, [FSoundQualityInfo](API\Developer\TargetPlatform\Interfaces\FSoundQualityInfo) & QualityInfo, [TArray](API\Runtime\Core\Containers\TArray)< uint8 > & OutBuffer ) const